Saul, tormented by the spirit, lies shaking on the floor of his chamber. David plays the harp, sweat running down his face. Saul stares at him, haunted.
SAUL: "Do you enjoy making me weak, David?"
DAVID: "No, my lord."
SAUL: "Then why do you look at me like that? Like you pity me. Like you love me."
DAVID: (a beat) "Because I do."
SAUL: "Liar." (throws a spear at the wall)
DAVID: "You don't believe me?"
SAUL: "I believe you belong to him now." (meaning Jonathan)
DAVID: "I never did. I only ever belonged to you."
........
Or a twist retake on the famous biblical story of king David based on my take and imagination on the biblical story